Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable


Icons aren't showing because I'm forcing the UI to be visible on macOS,
but things look ok on the right sidebar:

<img width="389" height="955" alt="Screenshot 2026-03-30 at 7 36 06 PM"
src="https://github.com/user-attachments/assets/269fe9c9-1212-4c1e-b8d9-1694db70adf3"
/>


Release Notes:

- N/A